gpu: nvgpu: gv11b: check subctx header err codes

React to possible errors in gr_gv11b_commit_inst() from allocating and
updating subcontext header.

Bug 1927306

Change-Id: I668e13ce13af296e9a7badb3b167fa7a7cd26212
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/1483043
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gv11b/gr_gv11b.c b/drivers/gpu/nvgpu/gv11b/gr_gv11b.c
index 46626bb7..179c7d33 100644
--- a/drivers/gpu/nvgpu/gv11b/gr_gv11b.c
+++ b/drivers/gpu/nvgpu/gv11b/gr_gv11b.c
@@ -1436,12 +1436,17 @@ static int gr_gv11b_commit_inst(struct channel_gk20a *c, u64 gpu_va)
         u32 addr_lo;
         u32 addr_hi;
         struct ctx_header_desc *ctx;
+        int err;
 
         gk20a_dbg_fn("");
 
-        gv11b_alloc_subctx_header(c);
+        err = gv11b_alloc_subctx_header(c);
+        if (err)
+                return err;
 
-        gv11b_update_subctx_header(c, gpu_va);
+        err = gv11b_update_subctx_header(c, gpu_va);
+        if (err)
+                return err;
 
         ctx = &c->ch_ctx.ctx_header;
         addr_lo = u64_lo32(ctx->mem.gpu_va) >> ram_in_base_shift_v();